Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee6181e6973177c…

MALICIOUS

PDF

103.2 KB Created: 2021-07-30 00:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fb0d2f597cb4ca5e7d4226c5fbb1294d SHA-1: 58797423179838bf33e7718a551dc8a9bb7ae032 SHA-256: 0ee6181e6973177cac17d87a438941ef57df44e5142066140974ace0abf53e9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The document body is heavily obfuscated and unreadable, but the presence of external URIs and link farm heuristics strongly suggests the primary goal is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soltendance.com/stockages/files/9656202473.pdf In PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096e61b0dbe4---99175209503.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a9723e19511---jitun.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/cum67hv5pk56gifnc7fmv8ev0j/zawekajo.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/57500561015.pdfIn PDF document text
    • http://hintzfamilyreunion.com/clients/1/12/12a2788c5de59b93c87e4eff35998d4f/File/26555129181.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609974a472323---5829309782.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160862f91a41a4---pakiwes.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/6d5b277696efc2db1514e4720e0a102b/labarevunutisubu.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d098981e7a---xazexezuzaxuzob.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/63654901192.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/8k2iku9rgb9jod3chq8jgr5dor/47607456891.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/84049017134.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/46667186907.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1626517591_2db6480ca2.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/t8bc35pv00l4eof1int4rn9ep7/49595110441.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/26440781417.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/52405215656.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/voxirurikojaxojijopakokot.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e9a185c04---24217027657.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/mibexafutaxuwunigitu.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/26858207154.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c012de361ca---64821201873.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e132f9bff67---konodutije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=kanto+pokemon+name+listPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B8 17320 bytes
SHA-256: 19a7cc131ea88996ec78b4c5e30f388bd442f4e265c5e893961f3b3d60f851cc
font_01_sfnt_off00015df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF2 10396 bytes
SHA-256: 3035211d609b329d6da97630234f9b8a26fc169d97d83542a5226ad67bd1bd60
font_02_sfnt_off00017576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1